We only want UCDN if we don't have any other Unicode provider.
I'm going to remove ICU from the list of default Unicode providers
as part of moving hb-icu into its own library. As such, the only
providers will be UCDN and glib.
dnl ===========================================================================
have_ucdn=true
+if $have_glib; then
+ have_ucdn=false
+fi
if $have_ucdn; then
AC_DEFINE(HAVE_UCDN, 1, [Have UCDN Unicode functions])
fi